dropbox/pyston — pull request #215 by vinzenz (2014-11-11 16:58:40+00:00)
Title: Set pypa option for not handling future import errors

Merging this requires an update of libpypa to the latest master.

In order to behave the same like the cpython backend, I had to introduce an option to suppress the '__future__' import errors. Otherwise the outputs won't be the same.